Fair Value of Financial Instruments (Carrying and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Assets
Fixed maturity AFS securities		$ 105,200	$ 94,024
Trading securities		4,673	1,950
Equity securities		103	99
Mortgage loans on real estate		16,339	13,260
Derivative investments		1,911	1,107
Other investments		2,994	2,267
Other contract holder funds:
Benefit Plans' Assets		1,589	1,420
Carrying Value [Member]
Assets
Trading securities		4,673	1,950
Equity securities		103	99
Mortgage loans on real estate		16,339	13,260
Derivative investments	[1]	1,911	1,107
Other investments		2,983	2,255
Cash and invested cash		2,563	2,345
Other assets - GLB direct embedded derivatives		450	123
Other assets - GLB ceded embedded derivatives		60	72
Indexed annuity ceded embedded derivatives		927	902
Separate account assets		153,566	132,833
Other contract holder funds:
Remaining guaranteed interest and similar contracts		(1,900)	(542)
Account values of certain investment contracts		(38,639)	(34,535)
Short-term debt		(300)
Long-term debt		(6,067)	(5,839)
Reinsurance related embedded derivatives		(327)	(3)
Benefit Plans' Assets	[2]	1,589	1,420
Fair Value [Member]
Assets
Trading securities		4,673	1,950
Equity securities		103	99
Mortgage loans on real estate		16,872	13,092
Derivative investments	[1]	1,911	1,107
Other investments		2,983	2,255
Cash and invested cash		2,563	2,345
Other assets - GLB direct embedded derivatives		450	123
Other assets - GLB ceded embedded derivatives		60	72
Indexed annuity ceded embedded derivatives		927	902
Separate account assets		153,566	132,833
Other contract holder funds:
Remaining guaranteed interest and similar contracts		(1,900)	(542)
Account values of certain investment contracts		(46,822)	(36,358)
Short-term debt		(304)
Long-term debt		(6,217)	(5,604)
Reinsurance related embedded derivatives		(327)	(3)
Benefit Plans' Assets	[2]	1,589	1,420
Fixed Maturity AFS Securities [Member] | Carrying Value [Member]
Assets
Fixed maturity AFS securities		105,200	94,024
Fixed Maturity AFS Securities [Member] | Fair Value [Member]
Assets
Fixed maturity AFS securities		105,200	94,024
Future Contract Benefits [Member] | Carrying Value [Member]
Future contract benefits:
Indexed annuity and IUL contracts embedded derivatives		(2,585)	(1,305)
Future Contract Benefits [Member] | Fair Value [Member]
Future contract benefits:
Indexed annuity and IUL contracts embedded derivatives		(2,585)	(1,305)
Other Liabilities [Member] | Carrying Value [Member]
Other contract holder funds:
Other liabilities - derivative liabilities	[1]	(349)	(160)
Other Liabilities [Member] | Fair Value [Member]
Other contract holder funds:
Other liabilities - derivative liabilities	[1]	(349)	$ (160)
Other Liabilities [Member] | GLB Ceded Embedded Derivatives [Member] | Carrying Value [Member]
Other contract holder funds:
Other liabilities - GLB embedded derivatives		(9)
Other Liabilities [Member] | GLB Ceded Embedded Derivatives [Member] | Fair Value [Member]
Other contract holder funds:
Other liabilities - GLB embedded derivatives		$ (9)

[1] We have master netting agreements with each of our derivative counterparties, which allow for the netting of our derivative asset and liability positions by counterparty.

[2] Included in the funded statuses of the benefit plans, which is reported in other liabilities on our Consolidated Balance Sheets. Refer to Note 17 for information regarding our benefit plans.